Screaming Machinery are a power-trio from Manchester, playing rock gigs to rapturous crowds. But their fans don't realise they're also mighty heroes, regularly saving the world with magic and sword.

They are called upon again when Manchester comes under dire threat. Eighteen murders take place, each a node in a vast rune drawn across the city in blood. Something very large and powerful is coming through and it's up to Screaming Machinery to try and stop it...